How do I keep a streak on 3v3 arenas on Marvel Contest of the Champions?

Well, I guess I'll just post what I found on Reddit:

• Battles 1 through 8 or 9, easy.
• 9 through 15, sandbag. Play 2 champs around the same, and 1 really weak one. If you get a match up too difficult, pay the credits for a new matchup. I prefer to use champs that are around 1200 PI each.
• 16, 17 and 18, Keep your team PI above 5500. Typically you need to use 4*s that are 3/30. If your PI is not above 5500, you will get the monster 14,000 PI teams.
• From 19 on, you can drop down, but keep your PI above 4000. All these numbers are without any buffs active. If you turn on any buffs, the PI requirements go up.

This should work for the current version 5.0. It is the best technique I found so far.

this might help as well

1 to 9 you can use your 3stars not ranked up or level up

9 to 12 - use 2 (3star champions that maxed out and must be above 1500pi) and another 3 star champ that is level 1

13-14 use three 4 star champs that should be 3/30 (on this level you will encounter KANGS TEAM or THANOS TEAM)

15-22 use three 4 star champs 3/30 (on this level you will encounter another players still controlled by AI so be carefull with selecting your champs make sure they dont trigger will power)

22 to infinity use a team of 4star champs that is 3/30 or maxed out 3star team should be more than 4500 PI ( by the way on streak 20 to infinity you will encounter enemies that labeled easy but dodges, parry and block like a beast)

Here is the method I use.

fights

• 1-8 weakest characters or highest 4 stars
• 9-12 lowest or maxed 3 stars
• 13-18 4 stars at 3/30 or better
• 19-infinity 2 4stars + 1 maxed 3 star
  • or 3 3 stars maxed
  • or 2 maxed 3 stars and a 2/20 3star

this has gotten me to 100 wins.

I figured it out! I have successfully done this repeatedly and failed when deviating. Note that number of battle below is 1 less than win count on screen.

3v3 1-3 stars:
1-8 whatever
9... 3 star max or 3.5k total PI

3v3 3-4 stars:
1-13 whatever. sand bag if you must (10-12).
14-15 4 star rank 3 or higher.
16... 3 stars max or higher no less than 5k total PI

3v3 1-5 stars:
1-15 whatever. sand bag if you must (10-16).
16-18 4 stars rank 4 or higher
18... 4 stars rank 3 or higher (mix 2x4 stars rank 1x2)

3v3 4-5 stars:
Sorry I only have 4 star rank 4 and lower. The requirements are too high for me.

(observation) It seems to me, when the easiest option is double your total PI is when the infinite starts, but it wont kick in unless you have high enough PI.

I think there is a point threshold for each level.

• 1-4 (doesn't matter)
• 5-9 (???)
• 10-14 (???)
• 15-20 (6000+)
• 20-* (4500+)

Some observations from play:

• I usually play all 4*s at the beginning, to max points, and because it doesn't seem to matter. As a plus, they recharge by the time you get to win #15.

• I usually do 3 mid-level 3*s for 5-9, and it works well, most of the time.

• I usually sandbag 10-14, with two high 3*s and one low 3*, but it never works well.

Based of my observations, I think it's a hero rating tier system. I'm just not sure what those levels are, exactly.